<template>
  <div class="app-container">
    <h2 style="text-align: center">发布新课程</h2>
    <el-steps
      :active="2"
      process-status="wait"
      align-center
      style="margin-bottom: 40px"
    >
      <el-step title="填写课程基本信息" />
      <el-step title="创建课程大纲" />
      <el-step title="提交审核" />
    </el-steps>
    <!-- 添加和修改章节表单 -->
    <el-button type="text" @click="saveChapterDialog">添加章节</el-button>
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form :model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节排序">
                <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>
        <!-- 添加和修改小节(课时)表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.free">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="上传视频">
          <!-- TODO -->
          <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadAlyVideo'"
            :limit="1"
            class="upload-demo">
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
            <span slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传</span>
            <i class="el-icon-question"/>
        </el-tooltip>
          </el-upload>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
      </div>
    </el-dialog>
    <!-- 章节 -->
    <ul class="chanpterList">
        <li
            v-for="chapter in chapterVideoList"
            :key="chapter.id">
            <p>
                {{ chapter.title }}
                <span class="acts">
                    <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                    <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
            </p>
            <!-- 小节 -->
            <ul class="chanpterList videoList">
                <li
                    v-for="video in chapter.children"
                    :key="video.id">
                    <p>{{ video.title }}
                <span class="acts">
                    <el-button style="" type="text" @click="openEditVideo(video.id)">编辑</el-button>
                    <el-button type="text" @click="removeVide(video.id)">删除</el-button>
                </span>
                    </p>
                </li>
            </ul>
        </li>
    </ul>
    <el-form label-width="120px">
      <el-form-item>
        <el-button type="primary" @click="previous" :disabled="saveBtnDisabled">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
      </el-form-item>
    </el-form>

  </div>
</template>
<script>
import chapter from "../../../api/edu/chapter";
import video from "../../../api/edu/video";
export default {
    data() {
        return {
          dialogChapterFormVisible:false, //章节弹框
          dialogVideoFormVisible:false,//小节弹窗
          saveVideoBtnDisabled:false,
            saveBtnDisabled:false, //是否禁用
            chapterVideoList:[],//章节小结列表
            courseId:'',//课程id
            chapter:{}, //章节
            video:{
                id:'',
                title: '',
                sort: 0,
                free: 0,
                videoSourceId: '',
                videoOriginalName:''//视频名称
            },//小节
            fileList:[],//视频列表,
            BASE_API:process.env.BASE_API,
        }
    },
    created() {
      if(this.$route.params && this.$route.params.id) {
            this.courseId = this.$route.params.id
            //根据课程id查询章节和小节
            this.getChapterAndVideo()
        }
      // console.log('chapter created')
      // if(this.$router.params && this.$router.params.id){
      //   this.courseId = this.$router.params.id
      //   console.log(courseId)
      //   this.getChapterAndVideo(courseId)
      // }

    },
    methods:{
// ============================视频上传==========================================
      //点击确定调用的方法
        handleVodRemove() {
            //调用接口的删除视频的方法
            video.deleteAlyVideo(this.video.videoSourceId)
                .then(response => {
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除视频成功!'
                    });
                    //把文件列表清空
                    this.fileList = []
                    //把video视频id和视频名称值清空
                    //上传视频id赋值
                    this.video.videoSourceId = ''
                    //上传视频名称赋值
                    this.video.videoOriginalName = ''
                }).catch(response => {
              //提示信息
              this.$message({
                type: 'error',
                message: '删除视频失败!'
              });
            })
        },
      beforeVodRemove(file, fileList){

        return this.$confirm(`确定移除 ${ file.name }？`);
      },
      handleUploadExceed(){
        this.$message.warning('想要重新上传视频，需要先删除已上传视频')
      },
      // 上传成功的回调
      handleVodUploadSuccess(response, file, fileList){
        //上传视频id赋值
        this.video.videoSourceId = response.data.videoId
        //上传视频名称赋值
        this.video.videoOriginalName = file.name
      },
// ============================小节==========================================
//打开编辑弹窗
      openEditVideo(videoId){
          this.dialogVideoFormVisible = true
          video.getVideo(videoId).then(
            response=>{
              this.video = response.data.video
            }
          )
      },
      //删除小节
      removeVide(videoId){
        this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          video.deleteVideo(videoId).then(response=>{
              this.$message({
            type: 'success',
            message: '删除成功!'
          });
          this.getChapterAndVideo()
          })

        }).catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          });
        });
      },
      // 打开添加小节弹窗
      openVideo(chapterId){
        this.dialogVideoFormVisible = true
        this.chapter.id = chapterId
        this.video = {}
        //清空视频列表
        this.fileList = []
      },
      saveVideo(){
        //添加课程id
            this.video.courseId = this.courseId
        this.video.chapterId = this.chapter.id
        video.saveVideo(this.video).then(response=>{
            //关闭弹窗
            this.dialogVideoFormVisible = false
            //提示
                    this.$message({
                        type: 'success',
                        message: '添加小节成功!'
                    });
            //刷新列表
            this.getChapterAndVideo()
        })
      },
      updateVideo(){
          video.updateVideo(this.video).then(response=>{
              this.dialogVideoFormVisible = false
              //提示
                    this.$message({
                        type: 'success',
                        message: '修改小节成功!'
                    });
            //刷新列表
            this.getChapterAndVideo()
          })
      },
      saveOrUpdateVideo(){
          if(!this.video.id){
            this.saveVideo()
          }else{
            this.updateVideo()
          }
      },

// ============================章节===========================================
      // 删除章节
      removeChapter(chapterId){
        this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          chapter.deleteChapter(chapterId).then(response=>{
              this.$message({
            type: 'success',
            message: '删除成功!'
          });
          this.getChapterAndVideo()
          })

        }).catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          });
        });
      },
      //打开编辑弹窗，做数据回显
      openEditChatper(chapterId){
          this.dialogChapterFormVisible = true
          chapter.getChapter(chapterId).then(
            response=>{
              this.chapter = response.data.chapter
              console.log(response.data.chapter)
            }
          )
      },
      //弹窗
      saveChapterDialog(){
          //打开弹出
          this.dialogChapterFormVisible = true
          //清空表单
          this.chapter = {}
      },
      // 添加章节
      saveChapter(){
         //添加课程id
        this.chapter.courseId = this.courseId
          chapter.saveChapter(this.chapter).then(response =>{
            //关闭弹框
            this.dialogChapterFormVisible = false
            //提示
                    this.$message({
                        type: 'success',
                        message: '添加章节成功!'
                    });
            //刷新列表
            this.getChapterAndVideo()
          })
      },
      // 修改章节
      updateChapter(){
        chapter.updateChapter(this.chapter).then(response =>{
          //关闭弹框
            this.dialogChapterFormVisible = false
            //提示
                    this.$message({
                        type: 'success',
                        message: '修改章节成功!'
                    });
            //刷新列表
            this.getChapterAndVideo()
        })
      },
      saveOrUpdate(){
       if(!this.chapter.id){
         this.saveChapter()
       }else{
         this.updateChapter()
       }
      },
     getChapterAndVideo(){
       chapter.getChapterAndVideo(this.courseId).then(response => {
         this.chapterVideoList = response.data.chapterVos
         console.log(this.chapterVideoList)
       })
     },


        previous() {
            this.$router.push({path:'/edu/course/info/'+this.courseId})
        },
        next() {
            //跳转到第二步
            this.$router.push({path:'/edu/course/publish/'+this.courseId})
        }
    }
}
</script>
<style scoped>
.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  /* float: left; */
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
    float: right;
    font-size: 14px;
}

.videoList{
  padding-left: 50px;
}
.videoList p{
  /* float: left; */
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}


</style>
